煤厚变化处弹性应变能分布规律及影响因素

Distribution Laws and Influence Factors of Elastic Strain Energy in Thickness Variation of Coal Seam

采用FLAC3D软件,模拟煤层厚度在10 m长度范围内从5 m变为1 m时,煤层厚度变化处弹性应变能分布规律,并且对其影响因素进行了分析。结果表明:在煤层变薄地区弹性应变能会增大,而在煤层变厚地区弹性应变能会减小,并且当煤层弹性模量越小,煤层顶底板越坚硬及煤层厚度变化越剧烈时,这一现象越为明显。

Based on software FLAC3 D,we simulates the distribution law of elastic strain energy in thickness variation of coal seam when the thickness of coal seam varies from 5 m to 1 m in 10 meters,and analyze its influence factors. The result shows that the elastic strain energy density will increase in coal seam thinning place and decrease in coal seam thickening place. This phenomenon will be more obvious when the elastic modulus of coal seam is lower,the coal seam roof and floor is harder and the thickness changing of coal is more severe.